公开(公告)号：WO2017014748A1

公开(公告)日：2017-01-26

申请号：PCT/US2015/041230

申请日：2015-07-21

Applicant: HALLIBURTON ENERGY SERVICES, INC.

Inventor： LEE, Young Ho ,  CRAWFORD, Micheal Burl

IPC: E21B10/08 ,  E21B10/10 ,  E21B10/62

CPC classification number: E21B10/22 ,  E21B10/08 ,  F16C17/02 ,  F16C2352/00

Abstract: The present disclosure relates to roller cone drill bit journals with asymmetric ball races and extended friction races. The disclosure also relates to methods of forming such journals, and methods of finishing these journals to produce finished journals with symmetric ball races.

Abstract translation: 本公开涉及具有不对称球形和延伸的摩擦力的滚子锥钻头轴颈。 本公开还涉及形成这种期刊的方法，以及整理这些期刊以产生具有对称球赛的成品期刊的方法。

公开(公告)号：WO2015088550A1

公开(公告)日：2015-06-18

申请号：PCT/US2013/074931

申请日：2013-12-13

Applicant: HALLIBURTON ENERGY SERVICES, INC.

Inventor： WILLIAMS, Mark Evans ,  CRAWFORD, Micheal Burl ,  BIRD, Jay Stuart ,  LEE, Young Ho

IPC: E21B10/22 ,  E21B10/573

CPC classification number: E21B10/22 ,  E21B10/18 ,  E21B10/24 ,  E21B10/50

Abstract: A disclosed example embodiment includes a drill bit used to form wellbores in subterranean formations. The drill bit includes a drill bit body for coupling to a lower end of a drill string. The drill bit body includes at least one support arm having an inwardly extending journal with a journal bearing having at least one radially reduced pocket extending at least partially circumferentially around the journal bearing including a load side of the journal bearing. At least one rotary cutter assembly is rotatably mounted to the journal. A plurality of cutting elements is disposed on the at least one rotary cutter assembly. At least two independent hardmetal pads are positioned within the at least one radially reduced pocket such that the hardmetal pads have a gap disposed therebetween.

Abstract translation: 所公开的示例性实施例包括用于在地下地层中形成井筒的钻头。 钻头包括用于联接到钻柱的下端的钻头体。 钻头体包括具有向内延伸的轴颈的至少一个支撑臂，轴颈轴承具有至少一个沿着轴颈轴承至少部分周向延伸的径向减小的凹部，轴颈轴承包括轴颈轴承的负载侧。 至少一个旋转刀具组件可旋转地安装到轴颈上。 多个切割元件设置在至少一个旋转刀具组件上。 至少两个独立的硬质合金垫定位在至少一个径向减小的袋内，使得硬金属垫在它们之间具有间隙。